KR20130120866A - Device and method for controlling of drive schedule in network operating center building energy management system - Google Patents

Abstract

The present invention relates to a device and a method for controlling the operation schedule of a refrigerator in a building energy management system to reduce energy consumption, to improve energy usage efficiency while maintaining pleasant indoor environments for buildings, and to enable efficient operation for refrigerators by generating input signals according to the input signals of users; enabling a manager to analyze cooling loads and refrigerator operation patterns through statistical data about a plurality of refrigerators in a refrigerator system, to check if refrigerators at proper capacity are operated based on the cooling loads using information monitored in a monitoring part, and to control the operation schedule for changing the operation sequence of the refrigerators. [Reference numerals] (1101) Check an operation schedule of a refrigerator;(1102) Analyze freezing load and the operation pattern of the refrigerator;(1103) Change the operating order of the refrigerator?;(1104) Control the operating schedule of the refrigerator;(1105) Make a request for operation;(1106) Is an alarm generated?;(1107) Check energy saving;(AA) Start;(BB) End

Description

Device and method for controlling operation schedule of refrigerator in building energy management system {Device and method for controlling of drive schedule in Network Operating Center Building Energy Management System}

The present invention relates to a building energy management system, and in particular, while maintaining a comfortable indoor environment of a building by changing the operation order of a plurality of refrigerators so as to operate an appropriate refrigerator according to a cooling load among a plurality of refrigerators. The present invention relates to a refrigeration operation schedule control apparatus and method in a building energy management system for improving energy use efficiency.

In Korea, which is highly dependent on the supply and demand of energy resources, the consumption of imported energy does not decrease even in the period of very high oil prices. In view of these circumstances, technology development and application of energy saving in the building sector is considered as a very important field among energy consumption fields.

Efficient use of energy in buildings is an important factor that has a direct impact on landlords and the national infrastructure industry.

In particular, unreasonable energy use in buildings is also associated with inefficient operation and management of the facilities in the building. For example, the fact that 20% of the summer's electricity demand is the share of the cooling load in the building's total load indicates that cooling load has a significant effect on peak power and power reserves. Occupies. Energy saving methods in such buildings include architectural planning approaches and facility approaches that improve the operating efficiency of energy-using devices and systems. Among these approaches, in the field of facilities, it is required to create a proper environment and to design energy consumption and environmental conservation and to operate an efficient facility system.

In addition, from the standpoint of the owner of the building, the energy consumption of the building is connected to the financial expenditure, so the energy consumption of the inefficient building has a significant financial burden on the building owner. In order to solve these problems, it is required to efficiently and systematically manage the use of energy consumed in buildings.

However, the operation of each building, especially the operation of the freezer, is operating by cooling all the freezers installed in the building when the conditions for refrigeration are required, and the driver adjusts the output of the freezer when the driver feels that the internal temperature is too high or too low. There is a problem that the operation of the building is inefficient.

Accordingly, the present invention has been proposed to solve the conventional inconvenience, by remotely monitoring and analyzing the cooling load in the building energy management system to select the appropriate refrigerator according to the cooling load of the plurality of refrigerators to enable efficient operation of the refrigerator. By providing a device and method for controlling the operation schedule of the refrigerator in the building energy management system to increase the energy use efficiency while maintaining a comfortable indoor environment of the building.

Particularly, in the present invention, when a plurality of refrigerators having different rated capacities are installed, the refrigerator is used in a building energy management system to save energy by adjusting an operation sequence according to the rated capacity, characteristics, and raw material cost of the refrigerator in consideration of the cooling load for each period. An apparatus and method for controlling a driving schedule is provided.

Refrigerator operation schedule control device in the building energy management system of the present invention for achieving the above object, the monitoring unit for monitoring the refrigerator system in real time; And cooling load and freezer operation trends through statistical data and preset operation schedules for a plurality of refrigerators with different capacities included in the refrigerator system, and using cooling information obtained through real-time monitoring. It checks whether the refrigerators of the capacity are suitable and determines the operation sequence of the plurality of refrigerators, and if the operation sequence needs to be changed, the operation schedule control is performed to change the operation sequence of the plurality of refrigerators according to the set control value. It includes a control unit.

In addition, the refrigerator operation schedule control apparatus in the building energy management system of the present invention for achieving the above object, the operation management schedule, statistical data, the result information according to the cooling load and the refrigerator operation trend analysis, monitoring information and a plurality of The apparatus may further include a storage configured to store at least one or more pieces of information on a change in the operation order of the refrigerator.

In the refrigerator operation schedule control apparatus in the building energy management system of the present invention, the control unit applies preset basic data of the refrigerator system to the simulation, and controls the operation schedule for the plurality of refrigerators through simulation according to environmental variables. After deriving the first control value, correcting the first control value derived using the statistical data to set the second control value, and primarily changing the operation order of the plurality of refrigerators to the set second control value, Using the monitoring information obtained by monitoring the refrigerator system in real time, the second control value is corrected to set the final control value, and the refrigerator operation schedule control is performed to finally change the operation order of the plurality of refrigerators to the set final control value. .

In the refrigerator operation schedule control apparatus in the building energy management system of the present invention, the controller changes the operation order of the plurality of refrigerators by first applying one or more of the small capacity refrigerators and the freezers having good maneuverability or performance coefficient.

In the refrigerator operation schedule control apparatus in the building energy management system of the present invention, the control unit predicts the cold water generation amount and the cold water reciprocation temperature difference of the plurality of refrigerators through the monitoring information, and uses the predicted cold water generation amount and the predicted cold water reciprocation temperature difference. The cooling load for the plurality of refrigerators is checked, and it is determined whether the refrigerator having the capacity corresponding to the cooling load is driven in the refrigerator system according to the identified cooling load.

In the refrigerator operation schedule control apparatus in the building energy management system of the present invention, the controller checks the temperature change of one of the cold water supply temperature and the room temperature through real-time monitoring, and operates the plurality of refrigerators according to the cooling load. And low load operation, and periodically check the coefficient of performance (COP) for a plurality of refrigerators to check the performance change over time.

On the other hand, the refrigerator operation schedule control method in the building energy management system of the present invention for achieving the above object, the step of monitoring the refrigerator system in real time; Analyzing cooling load and freezing operation trends through statistical data and preset operating schedules for a plurality of freezers having different capacities included in the freezing system; Determining whether the operation order of the plurality of refrigerators is changed by checking whether a refrigerator having a capacity corresponding to a cooling load is driven in the refrigerator system using monitoring information obtained through real-time monitoring and analysis results of the refrigerator operating trend; And when a refrigerator having a capacity suitable for the cooling load is not driven and thus a change in the operation sequence is required, performing operation schedule control for changing the operation sequence for the plurality of refrigerators.

In addition, the refrigerator operation schedule control method in the building energy management system of the present invention for achieving the above object, after changing the operation order for a plurality of refrigerators, to determine whether the alarm occurs according to the abnormal operation of the refrigerator system. step; And when the alarm occurs, performing operation schedule control for changing the operation order of the plurality of refrigerators again.

In addition, the refrigerator operation schedule control method in the building energy management system of the present invention for achieving the above object, after changing the operation order for a plurality of refrigerators, analyzing the monitoring information obtained by monitoring the refrigerator system in real time step; And confirming the energy saving results and effects for each period according to the analyzed result information.

In the method of controlling a refrigerator operation schedule in a building energy management system of the present invention, analyzing the cooling load and the refrigerator operation trend through statistical data of the plurality of refrigerators comprises: a plurality of refrigerators through statistical data and a preset operation schedule. Performing a performance analysis on the rated capability and the actual capability of the; Checking an operating state of the plurality of refrigerators through the statistical data and a preset driving schedule; Confirming cooling loads of the plurality of refrigerators through statistical data and a preset operation schedule; And confirming adequacy of the operation sequence according to the capacity of the refrigerator corresponding to the identified cooling load.

In the method of controlling a refrigerator operation schedule in a building energy management system of the present invention, the checking of the cooling load of the plurality of refrigerators through the statistical data may include: checking the cold water flow rate, the cold water return temperature, and the cold water supply temperature from the statistical data. ; Confirming the amount of cold water generated through the flow of cold water; Calculating a cold water reciprocating temperature difference using the cold water return temperature and the cold water supply temperature; And determining the cooling load by using the amount of cold water generated and the difference in temperature of the cold water reciprocating. In the method of controlling a refrigerator operation schedule in a building energy management system of the present invention, the performing of the operation schedule control for changing the operation order of the plurality of refrigerators may include applying preset basic data of the refrigerator system to the simulation, Deriving a first control value for driving schedule control for a plurality of refrigerators through a simulation according to environmental variables; Setting a second control value by correcting the first control value derived using the statistical data; Changing the operation order of the plurality of refrigerators primarily with the set second control value; Monitoring the freezer system in real time; Correcting the second control value using the monitoring information obtained through real-time monitoring to set a final control value; And performing a freezer operation schedule control to finally change the operation order of the plurality of freezers to the set final control value.

The present invention monitors and analyzes the operating conditions of a plurality of refrigerators having different rated capacity (capacity) in real time in real time to change the operation order of the refrigerators according to the rated capacity and characteristics of the refrigerator and the raw material cost in consideration of the cooling load. By optimizing the operation schedule for the field, it is possible to efficiently operate the refrigeration system to increase the energy use efficiency while maintaining a comfortable indoor environment of the building, thereby reducing the energy consumption.

In addition, the present invention by controlling the operation schedule for a plurality of refrigerators in the building energy management system, it is possible to reduce the power consumption of the refrigerator system, and to efficiently operate the building heat source equipment based on the systematic data to reduce the overall energy consumption There is an effect that can be reduced.

1 is a block diagram showing the structure of a general refrigerator system.
2 is a block diagram showing the structure of a refrigerator operation schedule control apparatus in a building energy management system according to an exemplary embodiment of the present invention.
3 is a flowchart illustrating a method for controlling the number of refrigerators in a building energy management system according to an exemplary embodiment of the present invention.
Figure 4 is a graph showing the operating status of the refrigerator according to the cooling load according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

Prior to the explanation, the Network Operating Center Building Energy Management System (NOC BEMS) is a system for improving energy performance while maintaining a comfortable indoor environment in buildings. In addition, it analyzes energy consumption and analyzes environment variables by time zone (for example, outside temperature, room temperature, humidity, and occupancy rate), and provides energy saving service to save building energy based on this.

Energy saving services in building energy management systems can be applied to buildings where the operation of the chiller is operated on a constant annual schedule, when the multiple chillers have different capacities and when the first freezer is large.

Hereinafter, an embodiment of the present invention will be described with respect to the apparatus and method for controlling the operation schedule of the refrigerator while performing the operating state monitoring and automatic control of the refrigerator system of the various equipment system in the building in the building energy management system.

 First, referring to the attached FIG. 1 for the refrigerator system, the refrigerator system 10 includes a plurality of refrigerators 11, a plurality of pumps 12 and a cold water supply header 13, a flow meter 14 and a cold water return header. 15 and the like, and are automatically controlled by the building energy management system. Here, the plurality of refrigerators 11 are freezers having various capacities and characteristics (starting ability), and may include a turbo freezer and an absorption freezer.

In order to automatically control the refrigerator system 10, the building energy management system changes its capacity according to the weather condition or the operating condition / load / time of the refrigerator 11, so that the situation is properly determined and the settings are adjusted accordingly. do.

On the other hand, prior to the description of the freezer operation schedule control, the manager checks the operation conditions and schedule status of the freezer currently used in the building for the freezer operation schedule control. The operation conditions and schedule status of the refrigerator can be checked through the operation log (data on operating hours and load rates of individual refrigerators per month / day / hour) and the rated capacity and starting capability of the refrigerator. It may be transferred to a freezer operation schedule control device of the energy management system, or may be directly input to the freezer operation schedule control device.

Next, a structure of a refrigerator operation schedule control device in a building energy management system for controlling a refrigerator operation schedule according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing the structure of a refrigerator operation schedule control apparatus in a building energy management system according to an exemplary embodiment of the present invention. 2, the refrigerator driving schedule control apparatus 100 according to an embodiment of the present invention is the input unit 110, the monitoring unit 120, the control unit 130, the output unit 140, the communication unit 150 and storage It may be configured to include the unit 160. In addition, the refrigerator operation schedule control apparatus 100 according to an embodiment of the present invention is included in the refrigerator system 10 in consideration of the rated capacity of the refrigerator, the characteristics of the refrigerator, and the raw material cost according to the cooling load in order to maintain a comfortable environment in the room. The refrigerator operation schedule of the refrigerator system 10 is controlled to change the operation order of the plurality of refrigerators 11 that have been operated.

The input unit 110 receives operation schedule information (including operating time, load ratio, rated capacity, etc.) for a plurality of refrigerators currently managed by an administrator. In addition, the input unit 110 generates a user input signal corresponding to a user's request or information according to a user's operation, and may be implemented by various input means that are currently commercialized or that can be commercialized in the future. For example, a keyboard In addition to general input devices such as a mouse, a joystick, a touch screen, a touch pad, and the like, gesture input means for detecting a user's motion and generating a specific input signal can be included.

The monitoring unit 120 may monitor real-time energy monitoring and period-specific energy monitoring, facility / control, indoor environment, or alarm. In particular, in the present invention, the monitoring unit 120 monitors the freezer system 10 through various sensors and measuring instruments installed in the freezer system 10, in particular, the main monitoring items preset in relation to the freezer system 10. It monitors in real time and collects the monitoring information obtained through monitoring. In addition, the monitoring unit 120 monitors the main monitoring items by monitoring the refrigerator system 10 in real time after the operation order of the plurality of refrigerators 11 in the refrigerator system 10 is changed, and monitors the current state of each refrigerator. To collect the monitoring information, and transfer the collected information to the controller 130.

Specifically, the monitoring unit 120 checks whether there is a change in the cold water supply temperature or a change in the room temperature according to the optimization of the operation schedule of the refrigerator according to the cooling load, and monitors whether there is a problem in the comfort of the room. In addition, the monitoring unit 120 checks the operation status of the refrigerator according to the cooling load and whether or not the low load operation in order to optimize the schedule so that the efficiency of the refrigerator is not deteriorated. By periodically checking the performance, it is possible to detect the performance change of the plurality of refrigerators 11 with time.

The main monitoring items monitored in real time through the monitoring unit 120 include cold water return temperature, cold water supply temperature, cold water flow rate, freezer operation status, freezer energy usage, freezer load rate, room temperature, coolant supply temperature, coolant return temperature, coolant flow rate, Cooling tower power consumption and pump (cold water pump, cooling water pump, etc.) power consumption, and the like. In addition, it may further include other items necessary for the refrigeration operation schedule control.

Looking at these main items, the cold water supply temperature and the cold water return temperature is to check the range of the cold water supply temperature and the cold water return temperature, and to determine whether the difference (ΔT) between the cold water supply temperature and the cold water return temperature is secured. Cold water flow rate is an item for confirming the supply amount of cold water. The operation state of the freezer is an item for checking the operation switching point of the freezer. Refrigerator power consumption is an item for checking the energy consumption before and after the control is compared with the power consumption of the refrigerator, cooling tower, cooling water pump and cold water pump. Refrigerator load rate is an item to prevent low load operation by checking the load rate of the freezer. The room temperature is an item for checking the change of the indoor environment according to the adjustment of the driving schedule. In addition, the coolant supply temperature is an item for confirming the lower limit of the coolant supply temperature, and the coolant return temperature is an item for confirming whether the temperature difference between the coolant supply temperature is secured and the coolant flow rate is a change in the power consumption of the coolant pump. This item confirms and checks the cooling load.

The monitored monitoring information may be stored as statistical data in the storage unit 160 and managed by period (day / month / day / year / quarter / half year / season).

The controller 130 controls the overall operation of the refrigerator driving schedule control apparatus 100. In particular, according to an embodiment of the present invention, the controller 130 analyzes the cooling load and the driving tendency of the plurality of refrigerators 11 through the accumulated statistical data and an operation schedule input from a preset or administrator. That is, the controller 130 analyzes the performance of rated capacity and actual capacity of each refrigerator 11 and checks whether there are frequent operation switching (ON / OFF) situations through the operating state of each refrigerator 11, The cooling load is checked using the cold water reciprocating temperature difference, which is a temperature difference between the cold water generation amount of the freezer 11 and the freezer cold water supply temperature. In addition, the controller 130 checks the appropriateness of the operation sequence according to the rated capacity of each refrigerator 11 corresponding to the cooling load with reference to the cooling load of the building and the operation record of each refrigerator 11. Through such confirmation, the controller 130 may derive an optimal driving method using the accumulated statistical data. In addition, the controller 130 uses the monitoring information obtained by monitoring the refrigerator system 10 to check the temperature change of one of the cold water supply temperature and the room temperature, and operate the plurality of refrigerators 11 according to the cooling load. Check the situation and the presence / absence of low load operation.

Trend comparison analysis items for such a freezer operation schedule control is as shown in Table 1 below.

No. Item Data interval X-axis Y-axis Y'-axis Remarks Name Unit Name Unit Name Unit One By period vs cooling load vs. freezer operation load January time hour Cooling load Kcal / h Freezer operation load Kcal / h

The controller 130 is appropriate to the cooling load of the building based on the monitoring information and cooling load obtained by monitoring the main monitoring items of the refrigerator system 10 in the monitoring unit 120 and the analysis result of the operation trend of the refrigerator. After determining whether the refrigerator 11 of the capacity is being driven, the operation schedule control for changing the operation order of the refrigerator 11 is performed through the determination result. Here, when it is determined that the operation order needs to be changed, the controller 130 performs the refrigerator operation schedule control to change the operation order by giving priority to a small capacity refrigerator, a refrigerator having a good starting capability or a good COP.

 Specifically, the controller 130 applies the basic setting values of the refrigerator system 10 to the simulation, and primarily through simulation according to environmental variables (for example, outside temperature, room temperature, humidity, occupancy rate, etc.). A first control value is derived. Next, the controller 130 corrects the first control value using the accumulated statistical data to set the second control value. Finally, the controller 130 performs the refrigerator operation schedule control with the second control value and then corrects the second control value according to the site through monitoring information obtained by monitoring the refrigerator system 10 in real time to control the refrigerator operation schedule. Set the final control value for. Accordingly, the controller 130 performs the refrigerator operation schedule control by changing the operation order of the plurality of refrigerators 11 in the refrigerator system 10 according to the set final control value.

On the other hand, the controller 130 may make a request to the manager to control the operation schedule of the refrigerator as needed. To this end, the controller 130 generates job request information for the freezer operation schedule control, and transmits the generated job request information to the manager. Accordingly, the manager changes and optimizes the operation order of the refrigerators according to the work request to operate the refrigerator system 10, and transmits the result to the refrigerator operation schedule control device 100.

In addition, the controller 130 checks whether an alarm occurs due to an abnormal operation of the refrigerator system 10 through an operation of controlling a refrigerator operation schedule, that is, an alarm management item set during an application period of an energy saving service. When an alarm occurs in the freezer system 10, the freezer operation schedule control is performed again according to the analysis result of the monitored information. Here, the alarm is generated when the measured value in the refrigeration system 10 continuously or more than a predetermined number of times or a predetermined time in a certain period of time or more than the error range compared to the determination criteria.

In particular, in the embodiment of the present invention, the control unit 130 sets an alarm management item using, for example, the trend analysis result information and the monitoring result information of the statistical data, and the room according to the change in the number of operation of the refrigerator in the set alarm management item. An alarm is triggered when the measured value of the temperature change and the freezer load ratio is out of a preset set value, that is, inefficient operation switching.

The controller 130 performs the refrigerator operation schedule control to operate the refrigerators in a predetermined order, analyzes the result information obtained by monitoring the refrigerator system 10 in real time, and confirms energy saving effects according to the analyzed results. . To this end, the control unit 130 generates the energy saving report data (Report) by period (day / month / day / year / half year / quarter / season). The controller 130 delivers the energy saving result report data generated to the manager. Accordingly, when the manager reviews the energy saving report data and requests a review result or additional work item, the controller 130 registers information on the review result or additional work item as an example of an energy saving item.

The output unit 140 is a means for providing a user recognition of the operation result or state of the refrigerator driving schedule control apparatus 100. For example, a display unit that visually outputs through a screen or a speaker that outputs an audible sound. And the like. In particular, in the present invention, the output unit 140 configures and displays the screen so that the administrator can input the operation management schedule for the plurality of refrigerators 11, the result information and control unit monitored by the monitoring unit 120 The job request information and the energy saving report data generated in operation 130 may be displayed on the screen.

The communication unit 150 transmits and receives data by connecting to a terminal device of an administrator to be connected, and may transmit / receive data with other terminal devices through various communication methods as well as wired and wireless methods. In addition, data may be transmitted and received using one or more communication methods, and for this purpose, the communication unit 150 may include a plurality of communication modules that transmit and receive data according to different communication methods. In particular, in the present invention, the communication unit 150 may perform communication for changing the operation order of the plurality of refrigerators 11 by interworking with the refrigerator system 10 remotely, the operation generated by the controller 130 The request information and the energy saving report data are transmitted to the terminal device of the manager.

The storage unit 160 stores programs and data necessary for the operation of the refrigerator operation schedule control apparatus 100, and basically stores an operation program of the refrigerator operation schedule control apparatus 100, and inputs an operation management schedule. At least one of the operating log, the statistical data, the analysis of the trend of the statistical data, the monitoring information, the result information according to the effect analysis, the main monitoring items, and the information for changing the operation order of the refrigerator. Save it. In addition, the storage 160 may store the generated job request information, energy saving report data, and the like and store information related thereto. The storage unit 160 may include an optical media such as a magnetic media such as a hard disk, a floppy disk, and a magnetic tape, a compact disk read only memory (CD-ROM), and a digital video disk (DVD). Magnetic-optical media such as floppy disks, and ROM, random access memory (RAM), and flash memory.

Next, a method for controlling a refrigerator operation schedule according to a plurality of cooling loads in a refrigerator operation schedule control apparatus of a building energy management system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart illustrating a method for controlling a freezer operation schedule in a building energy management system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, in operation 1101, the refrigerator operation schedule control apparatus 100 may use a refrigerator operation time set in each refrigerator 11 through preset operation schedule information for a plurality of refrigerators 11 currently being used by the manager. Check the load rate and rated capacity.

In operation 1102, the refrigerator driving schedule control apparatus 100 analyzes the cooling load and the driving trend of the refrigerator 11 through the accumulated statistical data. Specifically, the refrigerator operation schedule control device 100 analyzes the performance of rated capacity and actual capacity of the plurality of refrigerators 11 and checks whether there are frequent operation switching (ON / OFF) of the plurality of refrigerators 11. Then, the cooling load of the many refrigerators 11 is confirmed. Here, the cooling loads of the plurality of refrigerators 11 confirm the amount of cold water generated in each refrigerator 11 through the cold water flow rate in the stored statistical data, and the cold water reciprocating temperature difference of each refrigerator 11 through the cold water return temperature and the cold water supply temperature. It can be obtained by using the confirmed cold water generation amount and the cold water reciprocating temperature difference.

At this time, the refrigerator operation schedule control apparatus 100 may check the operation status and low load operation of each refrigerator 11 through the measured refrigerator load rate by monitoring the refrigerator system 10 in real time. In addition, the refrigerator operation schedule control apparatus 100 may check whether the cold water return temperature changes and the room temperature changes to determine whether a problem occurs in the indoor comfort. The confirmed information is stored and managed in the storage 160. In addition, the refrigerator number control device 100 may analyze the monitoring information to predict the power consumption of the day and the power consumption by time zone of the day.

Accordingly, in step 1103, the refrigerator operation schedule control apparatus 100 compares the predicted value of the power consumption of the day and the time of day obtained by analyzing the monitoring information with the result information obtained through the trend analysis of the statistical data to compare the freezer system. It can be confirmed whether it is necessary to optimize the operation of (10). Accordingly, the freezer operation schedule control device 100 determines whether the refrigerator 11 of the appropriate capacity is being driven according to the cooling load situation for each period to determine whether the operation order of the plurality of freezers 11 needs to be changed.

As a result of the check, when it is necessary to change the operation order of the plurality of refrigerators 11, in step 1104, the freezer operation schedule control apparatus 100 sets a control value for optimizing the operation schedule of the freezer and sets the freezer operation schedule to the set control value. Perform control. At this time, the refrigerator operation schedule control device 100 changes the operation order by first applying a small capacity refrigerator, a refrigerator having good operating capacity or COP, among a plurality of refrigerators 11 included in the refrigerator system 10.

In detail, the controller 130 applies the basic set values of the refrigerator system 10 (for example, preset operation schedule information including a refrigerator operating time, a load ratio, and a rated capacity) to the simulation, and applies an environmental variable ( For example, a first control value is derived primarily through simulation according to outside air temperature, room temperature, humidity, and occupancy rate. Next, the controller 130 corrects the first control value using the accumulated statistical data to set the second control value. Finally, the controller 130 performs the refrigerator operation schedule control with the second control value and then corrects the second control value according to the site through monitoring information obtained by monitoring the refrigerator system 10 in real time to control the refrigerator operation schedule. Set the final control value for. Accordingly, the controller 130 performs the refrigerator operation schedule control by changing the operation order of the plurality of refrigerators 11 in the refrigerator system 10 according to the set final control value. In operation 1105, the freezer operation schedule control apparatus 100 requests a manager to control a freezer operation schedule as needed, thereby allowing the manager to directly control the freezer operation schedule in the field. To this end, the freezer operation schedule control apparatus 100 generates work request information and transmits the work request information generated to the manager, and receives the operation result information of the freezer system 10 according to the freezer operation schedule control from the manager. Store the received result information.

Thereafter, in step 1106, the refrigerator operation schedule control apparatus 100 checks whether an alarm has occurred in the cooling circulation system 10 according to a preset alarm item. Here, the preset registration alarm item may include the room temperature and the refrigerator load rate.

As a result of the check, if an alarm occurs, the refrigerator operation schedule control apparatus 100 proceeds to step 1104 and performs operation schedule control for the plurality of refrigerators 11 again with the control value set through the result information analyzed according to the monitoring. .

After the operation order of the plurality of refrigerators 11 is changed according to the refrigerator operation schedule control, in operation 1107, the apparatus for controlling operation of the refrigerator scheduler 100 monitors the refrigerator system 10 in real time and stores the monitoring information in the storage 160. Save and analyze monitoring information to confirm energy savings results and effects. In this case, the refrigerator operation schedule control apparatus 100 generates and manages energy saving report data by period (day / month / day / year / quarter / half year / season) by applying the confirmed energy saving result and effect. Can be.

The freezer operation schedule control device 100 transmits the energy saving report data generated in this way to the manager. Accordingly, when there is a request for delivering the result information or additional work items according to the result of the review of the energy saving report data from the manager, the refrigerator operation schedule control device 100 uses the review result information or information on the additional work items as an example of the energy saving item. You can register.

On the other hand, the refrigeration operation schedule control device 100 can determine the energy savings by analyzing the effect through the real-time monitoring result information of the freezer system 10, in order to analyze the energy saving effect of the freezer according to the year / month cooling load Analyze power consumption. The energy saving confirmation items stored to confirm the energy savings may include items such as refrigeration energy consumption comparison and monthly / year cooling load. Here, the refrigerator power consumption comparison item compares data on a monthly / year basis and checks the energy saving effect by comparing the year when the energy saving service is not provided with the year provided. In addition, the year / month cooling load is an item for confirming the year / month cooling load.

When a plurality of refrigerators 11 having different rated capacities (capacity), such as turbo chillers and absorption chillers, are installed in the chiller system 10 according to the method of controlling a chiller operation schedule as described above, an operation sequence of a plurality of chillers 11 is provided. The energy savings can be achieved by optimizing the freezer operation schedule by changing. For example, as shown in FIG. 4, when an appropriate refrigerator 11 is selected and operated according to a cooling load, it can be seen that efficient operation of the refrigerator 11 can be performed, thereby saving energy. Here, (a) of FIG. 4 shows that the freezer rated capacity is operated inefficiently as 400RT, and FIG. 4 (b) shows that the freezer rated capacity is efficiently operated as 200RT.

For example, it is possible to preferentially drive a turbo freezer with good starting efficiency, and to stop the turbo freezer at a time when power consumption is desired to be reduced. Absorption chillers operate at a stable load for good efficiency, so operating in a repeated ON / OFF state does not help save energy.

Such a freezer operation schedule control can be performed in an intermediate stage in which a coolant capacity increase is expected, such as a decrease in coolant temperature and a rise in cold water supply temperature.

The operation schedule control method of the refrigerator according to the present invention may be implemented in software form readable through various computer means and recorded on a computer readable recording medium. Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions recorded on the recording medium may be those specially designed and constructed for the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. For example, the recording medium may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), a digital video disk (DVD) Includes a hardware device that is specially configured to store and execute program instructions such as a magneto-optical medium such as a floppy disk and a ROM, a random access memory (RAM), a flash memory, do. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art. In addition, although specific terms are used in the specification and the drawings, they are only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention, and are not intended to limit the scope of the present invention.

The present invention relates to a refrigeration operation schedule control device and method in a building energy management system, and the rated capacity of the freezer in consideration of the cooling load by real-time monitoring and analysis of the operating conditions of several refrigeration units having different rated capacity in the refrigeration system By optimizing the operation schedule of the refrigerators by changing the operation order of the refrigerators according to the maneuverability and the COP, the efficient operation of the refrigerators is possible, so that the energy use efficiency can be increased while maintaining a comfortable indoor environment of the building. It can be used industrially because it can reduce usage.

10: freezer system 11: freezer
100: freezer operation schedule control device
110: input unit 120: monitoring unit
130: control unit 140: output unit
150: communication unit 160: storage unit

Claims (12)

A monitoring unit for monitoring the refrigerator system in real time; And
Analyzing cooling load and freezer operating trends through statistical data and preset operating schedules for a plurality of freezers having different capacities included in the freezer system, and using the monitoring information obtained through the real-time monitoring, It is determined whether to operate a refrigerator having a capacity corresponding to the cooling load, and to determine whether the operation sequence of the plurality of refrigerators is changed. A controller configured to perform driving schedule control;
Refrigerator operation schedule control device in a building energy management system comprising a. The method of claim 1,
The apparatus may further include a storage unit configured to store at least one of the operation management schedule, the statistical data, the result information according to the cooling load and the refrigerator driving trend analysis, the monitoring information, and information about a change in the operation order of the plurality of refrigerators. A refrigerator operation schedule control device in a building energy management system, characterized in that the. The apparatus of claim 1,
Apply preset basic data of the refrigerator system to a simulation, derive a first control value for operating schedule control for a plurality of refrigerators through simulation according to an environmental variable, and use the statistical data to derive the first control value A second control value is set by correcting a value, and the operation sequence of the plurality of refrigerators is changed first with the set second control value, and then the second control value is monitored using the monitoring information obtained by monitoring the refrigerator system in real time. The refrigerator operation schedule control in the building energy management system, characterized in that the control value is corrected, the final control value is set, and the refrigerator operation schedule control is performed to finally change the operation sequence of the plurality of refrigerators to the set final control value. Device. The apparatus of claim 1,
A refrigerator operation schedule control apparatus in a building energy management system, characterized in that the operation order of the plurality of refrigerators is changed by first applying at least one of a small capacity refrigerator and a refrigerator having a good maneuverability or performance coefficient. 5. The apparatus of claim 4,
Predict the cold water generation amount and the cold water reciprocating temperature difference of the plurality of refrigerators through the monitoring information, and confirm the cooling load for the plurality of refrigerators using the predicted cold water generation amount and the predicted cold water reciprocating temperature difference, And determining whether the refrigerator system is driving a refrigerator having a capacity suitable for the cooling load. According to claim 1, wherein the control unit,
The real-time monitoring checks the temperature change of one of the cold water supply temperature and the room temperature, and checks the operation status and low load operation of the plurality of refrigerators according to the cooling load, and the coefficient of performance for the plurality of refrigerators. (COP) periodically checks the performance change according to the period characterized in that the refrigeration operation schedule control device in a building energy management system. Monitoring the freezer system in real time;
Analyzing a cooling load and a freezing operation trend through statistical data and preset operating schedules for a plurality of freezing devices having different capacities in the freezing system;
Determine whether the operation order of the plurality of refrigerators is changed by checking whether the refrigerator having a capacity suitable for the cooling load is driven in the refrigerator system by using the monitoring information obtained through the real-time monitoring and the analysis result of the refrigerator operating trend. Doing; And
Performing an operation schedule control for changing an operation order of the plurality of refrigerators when the operation order of the refrigerator is not driven because the refrigerator having the capacity corresponding to the cooling load is not driven;
Refrigerator operation schedule control method in a building energy management system comprising a. The method of claim 7, wherein
Determining whether an alarm occurs according to an abnormal operation of the refrigerator system after the operation order of the plurality of refrigerators is changed; And
If the alarm occurs, performing operation schedule control for changing the operation order of the plurality of refrigerators again;
Refrigerator operation schedule control method in a building energy management system characterized in that it further comprises. The method of claim 7, wherein
Analyzing the monitoring information obtained by monitoring the refrigerator system in real time after the operation order of the plurality of refrigerators is changed; And
Confirming the energy saving result and effect for each period according to the analyzed result information;
Method of controlling the refrigeration operation schedule in the building energy management system further comprising. The method of claim 7, wherein analyzing the cooling load and the operation trend of the refrigerator through statistical data of the plurality of refrigerators,
Performing performance analysis on the rated capacity and the actual capacity of the plurality of refrigerators through the statistical data and the preset operation schedule;
Checking an operating state of the plurality of refrigerators through the statistical data and the preset driving schedule;
Confirming cooling loads of the plurality of refrigerators through the statistical data and the preset operation schedule; And
Confirming adequacy of the operation sequence according to the capacity of the refrigerator corresponding to the identified cooling load;
Refrigerator operation schedule control method in a building energy management system comprising a. The method of claim 10, wherein the checking of the cooling load of the plurality of refrigerators through the statistical data comprises:
Identifying a cold water flow rate, a cold water return temperature, and a cold water supply temperature in the statistical data;
Confirming the amount of cold water generated through the cold water flow rate;
Calculating a cold water reciprocating temperature difference using the cold water return temperature and the cold water supply temperature; And
Confirming a cooling load by using the amount of cold water generated and the difference in temperature of the cold water reciprocating;
Refrigerator operation schedule control method in a building energy management system comprising a. The method of claim 7, wherein the performing of the operation schedule control for changing the operation order for the plurality of refrigerators,
Applying first basic data of the refrigerator system to a simulation, and deriving a first control value for controlling an operation schedule of a plurality of refrigerators through a simulation according to an environmental variable;
Setting a second control value by correcting the first control value derived using the statistical data;
Changing an operation order of the plurality of refrigerators primarily with a set second control value;
Monitoring the freezer system in real time;
Setting a final control value by correcting the second control value using the monitoring information obtained through the real-time monitoring; And
Performing a refrigerator operation schedule control to finally change an operation sequence of the plurality of refrigerators to a set final control value;
Refrigerator operation schedule control method in a building energy management system comprising a.

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